1 files changed, 42 insertions, 0 deletions
diff --git a/libbb/bind_interface.c b/libbb/bind_interface.c
new file mode 100644
index 0000000..1eb4414
--- /dev/null
+++ b/libbb/bind_interface.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2014 RIPE NCC <atlas@ripe.net>
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+int bind_interface(int socket, int af, char *name)
+{
+	struct sockaddr_storage sa;
+
+	memset(&sa, '\0', sizeof(sa));
+
+	if (af == AF_INET)
+	{
+		sa.ss_family= AF_INET;
+		if (inet_pton(af, name,
+			&((struct sockaddr_in *)&sa)->sin_addr) == 1)
+		{
+			return bind(socket, (struct sockaddr *)&sa,
+				sizeof(sa));
+		}
+	}
+	else
+	{
+		sa.ss_family= AF_INET6;
+		if (inet_pton(af, name,
+			&((struct sockaddr_in6 *)&sa)->sin6_addr) == 1)
+		{
+			return bind(socket, (struct sockaddr *)&sa,
+				sizeof(sa));
+		}
+	}
+	if (setsockopt(socket, SOL_SOCKET, SO_BINDTODEVICE, name,
+		strlen(name)+1) == -1)
+	{
+		return -1;
+	}
+
+	return 0;
+}
+